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Gnana_Sekaran's avatar
Gnana_Sekaran
Level 4
11 years ago
Solved

MSDP 7.6.0.3 Space Reclaim - SLP Images

Hi ,

I have expired a backup image from the MSDP which is around 8 TB in size  & De-dup rate for this image is 42 %.

nbdelete /Queue processing/compaction ran at disk pool but there is no space released to disk pool ..not even bytes.

 

Earlier we have replicated this same image to target domain using nbreplicate command (same as source retention).

This backup image is still alive on target domain. But expired forcefully in source domain .would this control anything related  to space reclaim in source disk pool?

 

nbstlutil list doesn't shows anything releated to the same image in source .( expired already)

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  • sdo's avatar
    sdo
    11 years ago

    Did you also "nbdelete -force" ?  I sincerely hope that you did not - and please do NOT be tempted to run this command unless you are 100% confident that you understand the impact of this command.

    I'm only posting this, here and now, to WARN YOU TO NOT run that command, i.e. I'm posting this here in an effort to make sure that you consider your actions - IN CASE you stumble across it somewhere and are tempted to take that action - please don't... anyway read the very end of this post:

    https://www-secure.symantec.com/connect/forums/image-clean

     

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  • Nicolai's avatar
    Nicolai
    Moderator
    11 years ago

    What does a Crcontrol --dsstat show ?

    http://www.symantec.com/docs/TECH154127

    MSDP reclain tech note

    http://www.symantec.com/docs/HOWTO89055

  • Marianne's avatar
    Marianne
    Level 6
    11 years ago
    In addition to Nicolai's post, please bear in mind that only unique blocks are stored, although full size is reported and catalog'ed. Backup data on MSDP will only be deleted when no more backups reference/depend on it.
  • sdo's avatar
    sdo
    Moderator
    11 years ago
    Where you say "expired forcefully", please can you explain in detail what you did?
  • Gnana_Sekaran's avatar
    Gnana_Sekaran
    Level 4
    11 years ago

    Expired the images using bpexpdate -backupid -d 0 -force 

     

    First full backup size was 8 TB and de-dup rate was 42 % for initial backup.

    After that most of the daily/weekly backup de-dup was 98-99 %.

    We have now expired all of the (full + daily +weekly ) backup images for this volume.

    So there should not be any references to the data blocks .

     

     

  • Marianne's avatar
    Marianne
    Level 6
    11 years ago
    With 98-99% dedupe rate, just about everything in subsequent backups are still referencing the original backup.
  • sdo's avatar
    sdo
    Moderator
    11 years ago

    Did you also "nbdelete -force" ?  I sincerely hope that you did not - and please do NOT be tempted to run this command unless you are 100% confident that you understand the impact of this command.

    I'm only posting this, here and now, to WARN YOU TO NOT run that command, i.e. I'm posting this here in an effort to make sure that you consider your actions - IN CASE you stumble across it somewhere and are tempted to take that action - please don't... anyway read the very end of this post:

    https://www-secure.symantec.com/connect/forums/image-clean

     

  • Gnana_Sekaran's avatar
    Gnana_Sekaran
    Level 4
    11 years ago

    I can the image cleanup job was run successfully.

    nbdelete list - doen'st shows any backlogs and I tired to delete the fragments if any using

     

    nbdelete -dt 6 -media_id @1234 -media_server ABCCCC